Fantasy: The system takes me to refine the magic formula

The one who gained the most was the dark dragon. Long Tian originally thought that after absorbing so much immortal power, the dark dragon could break out of its shell!But what is surprising is that not only was the dark dragon not born, even the eggs became huge and crystal clear!
The egg, which was originally more than ten meters long, is now more than 30 meters long, and it still exudes a faint gray aura, but there seems to be some immortal power in this aura, which surprised Longtian!

"Host! Originally, this guy was going to break out of the shell, but I forcibly changed the growth cycle. Now this dark dragon is born as a holy beast! ~ You are lucky!"

Long Tianxiao chuckled, and then accelerated the absorption of the Arhat trap again. At this moment, the energy of the Arhat trap was running out. A few days ago, the blue-eyed nine-tailed fox expressed that he would break the trap with his own energy!
However, the system reminded that the barrier in this trap has the aura of the person who sealed the Nine-Tailed Fox back then. If it is forcibly broken, the other party will definitely know about it!

Long Tian told Nine-Tailed Fox this, and Nine-Tailed Fox was surprised that Long Tian could grasp such a thing: "Are you the reincarnation of Da Luo Jinxian?"

"Me? Hehe, guess what!"

"..." At this moment, the Nine-Tailed Fox did not dare to have any other thoughts about Longtian. It clearly felt that the more Longtian broke the knot seal, the more bound the soul contract with Longtian would be in its mind. The taller, the blue-eyed nine-tailed fox really couldn't understand, how did this little human use his own soul to imprison the souls of the monsters in the upper realm?
"Boom!" A loud noise came from the crater, and then spread in all directions. In an instant, all the monsters in this monster forest trembled. No matter whether it was the early stage of the first order or the peak of the ninth order, they all hid in their caves at this moment. calm down!
"Okay! It's done! Come out quickly! Let me see your true face of Mount Lu!" Long Tianfei said to the inside of the volcano after he arrived at the crater!
As soon as Long Tian's voice fell, a charming girl slowly floated to the position of the crater, facing Long Tian far away!
"What is your body?"

"Master, my real body is the blue-eyed nine-tailed fox! If the master is not afraid, I will become the real body for you to see!"

"it is good!"

As Long Tian nodded, the huge crater suddenly changed in space, and then a purple-red blue-eyed fox thousands of meters high appeared in front of Long Tian!
At this moment, Long Tian was taken aback by the sudden appearance of a giant. He never thought that a monster could be so huge!Originally thought that even if a fox cultivated into a demon, it would still be the size of a fox, but how could he think that the fox in front of him was like a mountain peak, and Long Tian was in front of it, almost so small that it could be ignored!
At this moment, the blue-eyed nine-tailed fox was looking at the master in front of it. After Long Tian broke his seal, it clearly felt that its soul was imprisoned by the human beings on the opposite side!However, the confinement of the soul is much better than the confinement of the body, and the practitioner in front of him seems to be easy to talk to!

The nine-tailed fox was flattering and shook its nine tails at Long Tian. Long Tian was dazzled when he saw the fox's nine tails swaying together!

"Okay, okay! Don't shake it anymore, I'm dizzy, you should go back to the way you were just now! Your body is so huge!"

"Yes, master!" The Nine-Tailed Fox, which had transformed back into its original body, came to Long Tian!

"Don't call me master, just call me young master! I'm not used to being called master!"

"Good sir!"

"Host! You, a monster, still can't use your monster power in the mortal world. Once you use it, the golden Buddha who imprisoned it will realize that its seal has been released!" The words of the system made Long Tian feel a little depressed. After a long time, he thought Make a super awesome monster, but it can't be used after getting it!

"That! Do you have a name?" Long Tian asked Nine-Tailed Fox!
"Li Yun'er!"

"Li Yun'er, I think you still need to be careful in the future. You can't use your demon power at will. Once you use it, the person who imprisoned you will notice it!"

"Yes, young master! Yun'er knows!"

"Hey, what a pity! I came this time to find some high-level monsters to tame, and then took them away. Unfortunately, I still walked away for nothing!"

"Master! You have signed me as your monster, can you sign other monsters?" Yun'er was puzzled!
"Okay, the purpose of my visit this time is to find powerful monsters!"

"That's easy!"

"? What's easy?"

Under Long Tian's puzzled eyes, Li Yun'er yelled softly at the sky, and a strange sound wave spread in all directions!
Not long after, many light spots appeared in all directions, and then quickly gathered towards the crater!
Then all that appeared in Long Tian's eyes were the ninth-level middle-level monsters and above them!
"Master! These monsters are all from the Forest of Monsters. I have been here for tens of thousands of years, and they all grew up in these ten thousand years! You can see which one you like, or you can take them all away!"

"Wow!!!! It's okay!" Long Tian looked at the Hydra, the Black Blood Leopard, the Earth Bear King, the Behemoth Behemoth, the Golden Winged Condor, and even the Silver Moon Demon that he had encountered before. Wolves, there are more than a dozen ninth-level monsters in front and back!
Long Tian didn't hesitate, anyway, the system said that he could sign a few, and he wanted to bring back one for Hong Ying. Long Tian chose a colorful sky heron for Hong Ying among all the monsters. Girls must like beautiful ones. And those who can cultivate to the ninth level are definitely not weak, they must have high talents!